The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Neenah you can determine when you can plant sunflowers by referring to the USDA zone info.

Planting Calendar for Sunflowers

Frost tolerance for sunflowers:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

You really shouldn't plant sunflowers until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant sunflowers in Neenah is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant sunflowers and expect a good harvest is probably August. You probably don't want to wait any later than that or else your sunflowers may not have a chance to grow to maturity. If you are starting your sunflowers indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Neenah. In the coldest months of winter you can expect an average low temperature of -20°F.

Since the USDA zone info for Neenah is not always accurate the actual date of last frost is different every year. Half of the time in Neenah you get surprised by a frost after April 15 so be sure to be ready to cover your sunflowers if you have one of those late frosts.

USDA Zone Info for Neenah

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Neenah

You may be interested in your other planting guides for Neenah.